This is a mixword. I'm not sure if it is the first one that I ever composed, but it is certainly one of the first.
This puzzle was solved by someone and witnessed by someone else. It's been so long since this happened that I don't have a clue who these two people were; they may have been, and I stress may have been, connected with the now long defunct Catford Centre For The Unemployed. I believe it was P.A. Jones who solved it.
My first ever published mixword appeared exactly one week later, in the Voice.